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Science 2 February 1962:
Vol. 135. no. 3501, pp. 377 - 378
DOI: 10.1126/science.135.3501.377
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Articles

Self-Regulated Exposure to Light by Dark- or Light-Treated Rats

Robert B. Lockard 1

1 Department of Psychology, University of Wisconsin, Madison

Rats allowed to expose themselves to light do so for a rather constant length of time each day. This duration of exposure depends upon both the brightness of the light used for testing and the illumination in which the rats were maintained before testing.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)